Nobody uses them, and for good reasons.
They totally suck.
They cost 4 points are stationairy, cannot be picked up, and you stop while laying them.
While an Anti-Cloak Grenade can be thrown while running, costs one point less and does basically the same.
They should rather be like:
- just cost 2 points
- and do significant damage (same like Frag grenades)
- be able to be thrown to the ground while still running
I think 2 points are totally justified if you cannot pick them up.